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1. The curved surface area of a right circular cone of height \(15 \ cm\) and base diameter \(16 \ cm\) is:
 
2. The height of a right circular cone whose radius is \(5\) \(cm\) and slant height is \(13\) \(cm\) will be:
 
3. The total surface area of a cylinder whose radius is \(\frac{1}{3}\) of its height is: